Speaker: 
Hugo Prager
Speaker affiliation: 
University of Southampton
Date: 
Thursday, October 30, 2014 - 13:00
Room: 
Building 46, seminar room (5th floor)
Title: 
Interference effects in multiple vector-like quarks production
Abstract: 

Vector-like quarks (VLQs) are particular kind of quark that are predicted by many models beyond the Standard Model. Experimental bounds on their masses are usually obtained assuming specific decay channels and considering scenarios with a single VLQ besides the SM; if the VLQ has different decay channels, and/or if there are multiple VLQs, the bounds coming from current experimental studies should be rescaled, and usually lowered. Interference effects may also play a relevant role if multiple VLQs are contributing to the same final state. In this talk, I will present and discuss a general method to evaluate the value of the tree-level interference terms under specific assumptions about the properties of the VLQs. I will also show how the method can be compared to and validated against results obtained with proper numerical simulations.